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/**
* Copyright 2012 Kjetil Ørbekk <kjetil.orbekk@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.orbekk.same.android.net;
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import android.content.Context;
import android.net.DhcpInfo;
import android.net.wifi.WifiManager;
public class Networking {
private Context context;
private Logger logger = LoggerFactory.getLogger(getClass());
public Networking(Context context) {
this.context = context;
}
public InetAddress fromInt(int ip) {
byte[] quads = new byte[4];
for (int k = 0; k < 4; k++)
quads[k] = (byte) ((ip >> k * 8) & 0xFF);
try {
return InetAddress.getByAddress(quads);
} catch (UnknownHostException e) {
logger.warn("Failed to find broadcast address.");
return null;
}
}
public synchronized DhcpInfo getDhcpInfo() {
WifiManager wifi =
(WifiManager)context.getSystemService(Context.WIFI_SERVICE);
return wifi.getDhcpInfo();
}
public synchronized InetAddress getWlanAddress() {
return fromInt(getDhcpInfo().ipAddress);
}
public synchronized InetAddress getBroadcastAddress() {
DhcpInfo dhcp = getDhcpInfo();
int broadcast = (dhcp.ipAddress & dhcp.netmask) | ~dhcp.netmask;
return fromInt(broadcast);
}
}
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